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According to the conjoined sister's Facebook Page, "Girls have been separated already now they go to a different rooms to begin the reconstruction thank you all for your prayers."

Jeff Salzgeber, a spokesman for Driscoll Children's Hospital said the multi-hour operation began Tuesday morning. Ximena and Scarlett Hernandez-Torres share a colon and bladders that will be reconstructed.

Their identical triplet sister, Catalina, was born without serious health issues.

The hospital staff has cared for the conjoined girls since they were transferred to the facility hours after birth. Dr. Haroon Patel says a team of specialists has been working for months to prepare for the surgery, which could last 12 to 18 hours.

A hospital statement says doctors have a positive outlook for the children's recovery.

The girls will require additional surgeries as they grow. FOX 7 first told you about Ximena and Scarlett back on March 28th. We shared this video on our Facebook page.